| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| /* StormMesa implementation of SDL OpenGL support */ |
| |
| #include "SDL_cgxgl_c.h" |
| #include "SDL_cgxvideo.h" |
| |
| #if SDL_VIDEO_OPENGL |
| AmigaMesaContext glcont=NULL; |
| #endif |
| |
| /* Init OpenGL */ |
| int CGX_GL_Init(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL |
| int i = 0; |
| struct TagItem attributes [ 14 ]; /* 14 should be more than enough :) */ |
| struct Window *win = (struct Window *)SDL_Window; |
| |
| // default config. Always used... |
| attributes[i].ti_Tag = AMA_Window; attributes[i++].ti_Data = (unsigned long)win; |
| attributes[i].ti_Tag = AMA_Left; attributes[i++].ti_Data = 0; |
| attributes[i].ti_Tag = AMA_Bottom; attributes[i++].ti_Data = 0; |
| attributes[i].ti_Tag = AMA_Width; attributes[i++].ti_Data = win->Width-win->BorderLeft-win->BorderRight; |
| attributes[i].ti_Tag = AMA_Height; attributes[i++].ti_Data = win->Height-win->BorderBottom-win->BorderTop; |
| attributes[i].ti_Tag = AMA_DirectRender; attributes[i++].ti_Data = GL_TRUE; |
| |
| // double buffer ? |
| attributes[i].ti_Tag = AMA_DoubleBuf; |
| if ( this->gl_config.double_buffer ) { |
| attributes[i++].ti_Data = GL_TRUE; |
| } |
| else { |
| attributes[i++].ti_Data = GL_FALSE; |
| } |
| // RGB(A) Mode ? |
| attributes[i].ti_Tag = AMA_RGBMode; |
| if ( this->gl_config.red_size != 0 && |
| this->gl_config.blue_size != 0 && |
| this->gl_config.green_size != 0 ) { |
| attributes[i++].ti_Data = GL_TRUE; |
| } |
| else { |
| attributes[i++].ti_Data = GL_FALSE; |
| } |
| // no depth buffer ? |
| if ( this->gl_config.depth_size == 0 ) { |
| attributes[i].ti_Tag = AMA_NoDepth; |
| attributes[i++].ti_Data = GL_TRUE; |
| } |
| // no stencil buffer ? |
| if ( this->gl_config.stencil_size == 0 ) { |
| attributes[i].ti_Tag = AMA_NoStencil; |
| attributes[i++].ti_Data = GL_TRUE; |
| } |
| // no accum buffer ? |
| if ( this->gl_config.accum_red_size != 0 && |
| this->gl_config.accum_blue_size != 0 && |
| this->gl_config.accum_green_size != 0 ) { |
| attributes[i].ti_Tag = AMA_NoAccum; |
| attributes[i++].ti_Data = GL_TRUE; |
| } |
| // done... |
| attributes[i].ti_Tag = TAG_DONE; |
| |
| glcont = AmigaMesaCreateContext(attributes); |
| if ( glcont == NULL ) { |
| SDL_SetError("Couldn't create OpenGL context"); |
| return(-1); |
| } |
| this->gl_data->gl_active = 1; |
| this->gl_config.driver_loaded = 1; |
| |
| return(0); |
| #else |
| SDL_SetError("OpenGL support not configured"); |
| return(-1); |
| #endif |
| } |
| |
| /* Quit OpenGL */ |
| void CGX_GL_Quit(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL |
| if ( glcont != NULL ) { |
| AmigaMesaDestroyContext(glcont); |
| glcont = NULL; |
| this->gl_data->gl_active = 0; |
| this->gl_config.driver_loaded = 0; |
| } |
| #endif |
| } |
| |
| /* Attach context to another window */ |
| int CGX_GL_Update(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL |
| struct TagItem tags[2]; |
| struct Window *win = (struct Window*)SDL_Window; |
| if(glcont == NULL) { |
| return -1; //should never happen |
| } |
| tags[0].ti_Tag = AMA_Window; |
| tags[0].ti_Data = (unsigned long)win; |
| tags[1].ti_Tag = TAG_DONE; |
| AmigaMesaSetRast(glcont, tags); |
| |
| return 0; |
| #else |
| SDL_SetError("OpenGL support not configured"); |
| return -1; |
| #endif |
| } |
| |
| #if SDL_VIDEO_OPENGL |
| |
| /* Make the current context active */ |
| int CGX_GL_MakeCurrent(_THIS) |
| { |
| if(glcont == NULL) |
| return -1; |
| |
| AmigaMesaMakeCurrent(glcont, glcont->buffer); |
| return 0; |
| } |
| |
| void CGX_GL_SwapBuffers(_THIS) |
| { |
| AmigaMesaSwapBuffers(glcont); |
| } |
| |
| int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) { |
| GLenum mesa_attrib; |
| |
| switch(attrib) { |
| case SDL_GL_RED_SIZE: |
| mesa_attrib = GL_RED_BITS; |
| break; |
| case SDL_GL_GREEN_SIZE: |
| mesa_attrib = GL_GREEN_BITS; |
| break; |
| case SDL_GL_BLUE_SIZE: |
| mesa_attrib = GL_BLUE_BITS; |
| break; |
| case SDL_GL_ALPHA_SIZE: |
| mesa_attrib = GL_ALPHA_BITS; |
| break; |
| case SDL_GL_DOUBLEBUFFER: |
| mesa_attrib = GL_DOUBLEBUFFER; |
| break; |
| case SDL_GL_DEPTH_SIZE: |
| mesa_attrib = GL_DEPTH_BITS; |
| break; |
| case SDL_GL_STENCIL_SIZE: |
| mesa_attrib = GL_STENCIL_BITS; |
| break; |
| case SDL_GL_ACCUM_RED_SIZE: |
| mesa_attrib = GL_ACCUM_RED_BITS; |
| break; |
| case SDL_GL_ACCUM_GREEN_SIZE: |
| mesa_attrib = GL_ACCUM_GREEN_BITS; |
| break; |
| case SDL_GL_ACCUM_BLUE_SIZE: |
| mesa_attrib = GL_ACCUM_BLUE_BITS; |
| break; |
| case SDL_GL_ACCUM_ALPHA_SIZE: |
| mesa_attrib = GL_ACCUM_ALPHA_BITS; |
| break; |
| default : |
| return -1; |
| } |
| |
| AmigaMesaGetConfig(glcont->visual, mesa_attrib, value); |
| return 0; |
| } |
| |
| void *CGX_GL_GetProcAddress(_THIS, const char *proc) { |
| void *func = NULL; |
| func = AmiGetGLProc(proc); |
| return func; |
| } |
| |
| int CGX_GL_LoadLibrary(_THIS, const char *path) { |
| /* Library is always open */ |
| this->gl_config.driver_loaded = 1; |
| |
| return 0; |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL */ |
| |